| 架空输电线路雷电过电压识别 |
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| 引用本文： | 杜林,戴斌,司马文霞,赵立进,周海.架空输电线路雷电过电压识别[J].高电压技术,2010,36(3):590-597. |
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| 作者姓名： | 杜林 戴斌 司马文霞 赵立进 周海 |
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| 作者单位： | 1. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044
2. 贵州电力试验研究院,贵阳,550002 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2009CB724504)~~ |
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| 摘 要： | 准确辨识架空输电线路雷电过电压类型对改进防雷设计具有十分重要的意义。为此,分析了感应、反击、绕击3种雷电过电压的发生机理,对输电线路雷电流行波波形特点的研究表明感应雷电过电压三相电流行波相似程度大,反击雷电过电压发生时,闪络相在绝缘子未击穿时,由于避雷线等的分流、耦合作用,存在空间电磁耦合电流,而绕击过电压闪络相不存在空间电磁耦合电流。提出了以输电线路雷电流行波三相电流波形最小相似度、上升时间比作为上述3种雷电过电压识别判据。还分析了上述特征参量在工程应用中可能受到的干扰因素及解决方法。大量EMTP仿真表明所提取的特征量有效可行。
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| 关 键 词： | 感应雷 反击 绕击 识别 三相电流行波 架空输电线路 |
Lightning Overvoltage Identification in Overhead Power Transmission Lines |
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| DU Lin
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DAI Bin
,
SIMA Wen-xia
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ZHAO Li-jin
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ZHOU Hai.Lightning Overvoltage Identification in Overhead Power Transmission Lines[J].High Voltage Engineering,2010,36(3):590-597. |
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| Authors: | DU Lin DAI Bin SIMA Wen-xia ZHAO Li-jin ZHOU Hai |
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| Affiliation: | 1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology;Chongqing University;Chongqing 400044;China;2.Guizhou Electric Power Test & Research Institute;Guiyang 550002;China |
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| Abstract: | Identifying the type of lightning overvoltages in overhead power transmission lines is crucial for improving lightning protection.The mechanisms of induced lightning,shield failure,back flashover are discussed.The analysis of the transmission line lightning current waveform shows that the three-phase current waves are quite similar when induced lightning happens.The space electromagnetic coupled current exists in fault phase before the flashover of insulators when back flashover happens,however,there is no ... |
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| Keywords: | induced lightning back flashover shield failure identification three phase current wave overhead power transmission line |
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